Try uninstalling and then reinstalling ESET.
ESET removal info here
After ESET has been correctly uninstalled, check to see if Windows Defender has auto enabled and allow it to update and carry out a full scan of your computer.
Once done, restart, make sure Windows and Windows Defender are fully up to date, reinstall ESET if you so wish.
If any AV product that you have is a paid for version you should always make sure that you have a copy of the product key kept somewhere safe just in case you ever wish to reinstall it.
PSU guidance - 10 stripe - Johnny Lucky - PC Mech - PSU Review Database PSU Lemon List Which power supply do you need?
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